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<h1>COM Interoperability Overview</h1>
<p>A benefit of OPC <?rh-udv_start name="TechnologyName" ?>Unified Architecture<?rh-udv_end ?> 
 is its ability to interoperate/integrate with OPC Classic technologies, 
 such as DA 2.05a and DA 3.0 etc. A &quot;gateway&quot; service is provided 
 with this package that will handle the integration for you. </p>
<p>The <a href="UaConfig_Manage_COM_Interop.htm">UA Configuration tool</a> 
 provides all of the options necessary to configure this <span style="font-style: italic;">gateway 
 </span>and allows you to configure:<span style="font-style: italic;"> 
 </span></p>
<ul type="disc">
	<li><p>An <a href="UaConfig_Manage_COM_Interop.htm#Wrap_a_UA_Server">OPC 
	 UA Server</a>, that can be accessed by a Classic OPC Client.</p></li>
	<li><p>An <a href="UaConfig_Manage_COM_Interop.htm#Wrap_COM_Servers">OPC 
	 Classic DA 2.05a Server</a>, that can be accessed by a UA Client.</p></li>
</ul>
<p>Note: You <span style="text-decoration: underline; ">must</span> <a 
	 href="Starting___Stopping_the_Service.htm">restart the Service</a> 
 whenever you make any changes to the gateway.</p>
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